The scene begins in the hallway of Royal Wood Elementary School. Adrien was talking to Nino, the school's DJ.
"What !? Your dad won't let you celebrate your birthday or have friends at home?" Nino is shocked by this news.
"He thinks that having friends can be a bad influence on me."
"You know what Adrien. After school I'm going to come over to your place and talk to your dad to make you one."
"Thanks Nino. It's really peaceful but I don't think he's going to accept it."
"Accept what?" Lincoln and Clyde join in their conversation.
"Adrien's father refused to let him celebrate his birthday." Nino explains the blond boy's problem.
"What !? What kind of father refuses to do that?"
"Mine."
"But I have an idea to change his mind. Are you helping us?" The DJ boy asks.
"Sure. We'll do anything for a friend." Clyde and Lincoln agree to help him.
"Great. After school, meet at the Agreste mansion."
After school. Lincoln, Clyde and Nino get into the limo with Adrien.
The black vehicle arrived at the Agreste mansion. They meet Gabriel on the stairs to the entrance hall.
"May I know who you are? And why are you in my house?"
"Hello man… I mean Mr. Gabriel. My name is Nino, these are my friends Lincoln and Clyde."
"Delighted ."
"Hello. "
"Dude I mean… Sir, please let Adrien celebrate his birthday. It's an important time for him." Nino says.
"Yes, he's right. A birthday is a day to have fun with your friends." Clyde said.
"He will be happy to celebrate with his new friends from Royal Wood." Lincoln said.
Gabriel listens to their every good argument for the suit of letting a party run and he's ready to say his green.
"After listening to all of your arguments. I can finally announce my decision."
"So it's yes?"
"My answer is no."
"What?!"
"And I also decided that the three of you are a bad association for my son and I forbid you to come back here."
"Adrien is saying something."
"…" Adrien wanted to contradict his father, it's impossible.
Angry, Nino leaves the house without saying anything. Lincoln and Clyde run after him.
Adrien goes to his room. Gabriel goes to his workshop, access is repeated through a secret passage and transforms into Hawk Moth.
"Now I just have to wait for his anger to get big."
Towards the park. Nino sits down and blows bubbles. Beside him, he sees a father who forces his son to come back.
"Daddy, I want to play again."
"No way. You still have homework to do."
"It's not fair."
"Adults are always there to ruin our lives. I wish they were gone!" Nino said angrily.
Hawk Moth sends a black butterfly which is absorbed by his bubble wand.
{Bubbler, I'm Hawk Moth. I give you the opportunity to make your wish come true. In exchange you have to bring me the Miraculous of the three super heroes. }
"Yes, butterfly." The young DJ turns into a red and blue villain, his bubble wand has grown huge.
Bubbler releases several bubbles in the city. Each captures the adults and soars to the sky.
Lincoln and Clyde go to see how their friends are doing. See the adults locked in the bubbles.
Lincoln's parents and Clyde's fathers are captured.
"My fathers!"
"Don't panic, Clyde. I'm sure Ladybug, Cat Noir and Ace de Roi will save the parents.
"Yes, you're right."
"I'm going to go and see how my sisters are doing, to make sure they're okay." Lincoln says but in reality he needs to get away to transform.
But the Bubbler stands behind them.
"Where are you trying to go like that?"
The scene changes to Marinette's house. The blue haired girl had finally finished the gift for Adrien. She goes down to the kitchen.
"Marinette, did you clean your room?"
"Mom, it's the end of the week."
"Ok, don't be surprised if I stumble upon your personal belongings."
"I will do it !" The girl with the blue hair changes her mind.
Marinette's mother opens the window, a bubble appears and the catch rises to the sky.
"Mom!"
"Hawk Moth to release a new villain." Tikki says.
"Yes, let's hurry to stop him."
Marinette transforms into Ladybug and goes outside. She sees all the adults being locked in the bubbles that fly up to the sky.
"Where's the villain?"
Suddenly the ladybug girl sees a bubble shape flying over the houses. She followed the bubbles to Adrien's house.
"Why Adrien's house?"
She watches from the roof. Downstairs, the villain had gathered all the students from Ms Johnson's class in the courtyard of the mansion.
The blond boy goes outside.
"Hi Adrien. Guess who threw you a great birthday party?"
"Nino?"
"Come have fun."
"If you allow, I must…"
"I understand this is the first time and you don't want to be too crazy?"
"Right. Come back soon so you can enjoy your first party."
Adrien goes inside and Plagg takes out his jacket.
"Plagg, we have to take action."
"Wait, Adrien. Maybe this is your chance to celebrate a real birthday. He won't have another chance." The Kwami cat said to Adrien.
"Yes but Nino ..."
"It's not like he's gonna go away."
"You're right. I can at least take the opportunity to have fun."
Adrien joins the party and he dances. Ladybug sees and undoes her transformation to join Adrien on the dance floor.
The two are dancing. Ivan stops on the wall.
"Hey! Why don't you dance?"
"I do not want. "
"So you're going to join the adults upstairs." Bubbler traps Ivan in a bubble and makes him fly away.
See it. Marinette, Adrien and Clyde decide to act. Everyone will hide and transform.
"Buller, the party is over."
"Why do you want to ruin my party? You're worse than adults."
"Children need adults.,"
"No! Adults prevent kids from having fun. I have an idea, if you are worried about adults, just join them!"
Bubbler throws bubbles at them. Ladybug, Chat and As fight against the bubbles but are captured.
The bubble flies away. Get up more and more.
"We have to find a way out of this, if we are imprisoned forever."
"I like this idea." Chat Noir likes this idea.
"Uh, did you forget, am I still here?" Ace de Roi points out that he is there.
"Use your Cataclysm!"
Cat Noir uses his special power to destroy the bubble. The three super heroes fall and are saved by the trampoline that was there by chance.
They return to Gabriel Agreste's mansion, ready to confront Bubbler .
"You again!"
"Yes, around times it will take. We will stop you ."
"Lucky Charm!" Her Lucky charm spawns a key. "How can I use this?"
The ladybug girl looks all around and sees the ventilation pipes.
"Full Deck!" It calls Royal Flush. The super hero version of Lana.
Ladybug gives the key to Royal Flush runs to the ventilation pipes while the three heroes create a diversion.
Royal Flush currency the air pipe which deflects the bubbles on the villain who is caught by his own trap.
The ladybug girl destroys the wand and the black butterfly comes out, gets captured.
"Miraculous Ladybug!"
Millions of ladybugs bring adults back to dry land. Nino becomes as before.
The students go home. Marinette takes the opportunity to drop off her gift.
(As in the episode, Nathalie removes the label and lends it to Adrien's father who offered it.)
The next morning. Adrien wears the scarf. Marinette is happy to see Adrien wearing the scarf she does.
"Hi Adrien, is that a new scarf?"
"Yes, it was my father who gave me the gift. I always thought who forgot my birthdays but I was wrong.,"
"Looks like adults can change."
"Yes."